Motors: expansible chamber type – With motive fluid valve – With ambient fluid inlet valve to expanding working chamber
Patent
1993-03-19
1995-11-21
Lopez, F. Daniel
Motors: expansible chamber type
With motive fluid valve
With ambient fluid inlet valve to expanding working chamber
91445, 91447, 91468, F15B 1108, F15B 1304
Patent
active
054676886
ABSTRACT:
An operating valve device for supplying fluid under pressure to an actuator comprises: a first hole (3) and a second hole (4) for allowing fluid under pressure supplied by a pump (P) into an inlet port (2) connected with the pump to selectively flow into pressure chambers (B.sub.1, B.sub.2) defined on both sides of an actuator (B) through outlet ports (6, 7), respectively; a first communication hole (12) and a second communication hole (13) formed coaxially and in opposed relationship with each other so as to allow the first and second holes, respectively, to communicate with a tank port (10); a first valve hole (14) and a second valve hole (15) formed coaxially in the valve body outside and in succession with these communication holes, respectively; a pair of support shafts (16, 16) inserted in these valve holes, respectively, in opposed relationship with each other; vacuum prevention valves (9, 9) each mounted on the leading end portion of each of the support shafts so as to open and shut the communication hole; and check valves (8, 8) each mounted on the axially intermediate portion of each of the support shafts so as to prevent fluid under pressure from flowing through the first and second holes, respectively, into the inlet port. Since the operating valve device has the vacuum prevention valves and the check valves mounted coaxially on the pair of support shafts, the whole operating valve device becomes compact, and fluid leakage can be reduced substantially.
REFERENCES:
patent: 2897651 (1959-08-01), Bregenzer
patent: 4065010 (1977-12-01), Worback
patent: 4569272 (1986-02-01), Taylor et al.
Maruyama Jun
Yamashita Koji
Kabushiki Kaisha Komatsu Seisakusho
Lopez F. Daniel
LandOfFree
Operating valve device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Operating valve device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Operating valve device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1130148